It should be OK to store new fields into objects that have no prototypes
https://bugs.webkit.org/show_bug.cgi?id=131905

Reviewed by Mark Hahnenberg.

* dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::emitPrototypeChecks):
* tests/stress/put-by-id-transition-null-prototype.js: Added.
(foo):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@167563 268f45cc-cd09-0410-ab3c-d52691b4dbfc